A window of Time

"A window of Time" represents a chance, an opportunity, or sometimes a grace period that you need to do something or nothing till the completion or fulfillment of whatever needs to be done within that period. It might be a split of second, a month, or a year. NO matter how long it is going to be, all we need to discern is to know when the window opened and when it closed, and do whatever efforts to complete things within.